Water-supplying attachment for rock-drills.



'No. 881,579. PATENTED MAR. 10, 1908.

HELLMAN & L. 0. BAYLES. WATER SUPPLYING ATTACHMENT FOR ROCK DRILLS.

APPL IGATION FILED DEC. 18, 1906.

2 SHEETSSHEBT 1.

No. 881,579. PATENTED MAR. 10, 1908.

H. HELLMAN & L. G. BAYLES. WATER SUPPLYING ATTACHMENT FOR ROCK DRILLS.

2 SHEETS-SHEET 2.

UNITED STATESMPAV'IENT OFFICE.

HENRY HELLMAN AND LEWIS (C )ND ICT BAYLES, OF J01 RNNESBURG. TRANSVAAL.

WA'I EB-SUPPLYING ATTACHMENT FOR ROCK-DRILLS.

To all whom it may concern:

Be it known that we, HENRY HELLMAN and LEwIs OONDICT BAYLES, c1t1zens of the United States, and residents of Johannesburg,

Transvaal, have invent-ed certain new and useful Improvements in 'ater-Supplying Attachments for RockDrills, of which the following is a specification.

This invention relates to rock drilling machines, and in particular to that type of machine in which the rotation of the drillin or boring bit or tool is efiected by or throug the medium of the power cylinder.

In this-type of machine it has previously been proposed to permanently mount at the front of the machine, either on the front head or on the forward end of the power cylinder, water supplying attachments for injecting into 'the bore hole at or in proximity to the cutting point of the bit, a uantity of water or water and air to convert t e detritus as it is formed intoslud e so as to prevent it issuing from the bore-ho e in the form of dust. Now while the provision of such attachments is desirable in the drilling of upper or up wardly inclined holes they are not re uired in the drilling of downwardly inclined oles, as in this latter case water can be placed and will remain in the hole.

The object of the present improvements is to provide means whereby the water suplply attachments may be detached'with faci ity when the machine is being employed for the drilling of such downwardly inclined holes, and as readily attached tothe machine when it is employed for drilling the upwardly inclined holes.

To this end the present invention consists I in theemployment of a detachable make-up piece interposedkbetween the machine and thebit, said piece being arranged or located at the forward end of the machine, and car in the water supplying attachments and t e drilling or boring bit' or tool.

aid of the accompanyingdrawing wherein,

' Figure 1 is a part sectional elevation of the .make-up The invention will be further described iece and its attachments, Fig. 2 is a rear en elevation, Fig. 3 is a transverse section ofFig. 1 on the line 00-00, Fig. 4 is a longitudinal elevation of a modification, Fig. 5-is a rear endelev'ation of Fig. 4, Fig. 6 is a transverse section of Fig. 4 on line y-y.

v Fig. 7is a longitudinal elevation of a further Specification of Letters Patent.

Application filed December 18, 1906.

with the hole 15.

PatentedMarch 10, 1908.

Serial No. 348,394.

modification, and Fig. 8 is a transverse section of Fig. 7 on line 2-2.

In the construction illustrated in Figs. 1, 2 and 3, 1 designates the detachable make-up piece, which, constructed as shown, comprises a front conical portion 2, a cylindrical intermediate portion 3 forming with the front portion 1 a shoulder 4, a screw-threaded portion 5 at the rear of said part 3, and a part 6 of square or other suitable polygonal transverse section. This latter ortion 6, which receives directly or indirectl y' the hammer piston or reciprocat ng percussive member of the machine, is made of the same cross section as the hole in the front end of the machine, shown in dotted lines at 6, so that when it is projected thereinto it is compelled to rotate in unison therewith. On the cylindrical intermediate portion 3 is arr mged the water supply swivel 7 which is constructed with a scrmv-threaded hole 8 communicating w th an internal recess 9.

1O isthe nipple screwed into the 110168 and 1 1 the hose or other flexible pipe fixed to said nipple 1O byihe hose-clamp 1;. This pipe 11. serves for conveying water to the swivel 7.

'The swivel on the one side abuts the shoulder 1 and next the swivel 7 on the opposite side is placed a washer 13, and over the threaded portion 5 is screwed a lock-nut 14 of any desired construction] p Packings may be; located at either side of the water swivel 7 and any otlier suitabl means may be adopted for securing the wa-- ter swivel round the make-up piece:

In the front portion 2 of'the make-up piece is formed an axial hole 15 of polygonal cross section. This hole is preferably the same size and shape as the rear part 6, so that the bits 16 are interchangeable or may be employed 1n the machineeither with or without the make-up piece, The shank or rear portion 17 of the bit 161s made of the same shape .in cross section as the hole 15 so that it is compelled to rotate with the make-up piece.

-An axial hole 18 is provided longitudinally of themake-up piece. preferably increases somewhat in diameter at the forwardend where it communicates In the cylindrical part 3 one or more forwardly inclined holes 19 are formed which communicate with the hole 18. The forwardly inclined hole or holes 19 serve for intermittently placing the recess 9 in the the imp acts of This hole 18 swivel 7? in communication with the hole .18. Constructed as shown, an intermittent water supply will be obtained, but it will be apparent that by making the recess 9 annular, or otherwise providing a continuous water space between the swivel 7 and part 3 or increasing the number of holes 19, a constant water supply may be Obtained. The bit 16 is'constructed with an axial 10 hole 20 terminating at or in proximity to the cutting end.

When the make-up piece 1-is in position in the machine 6*, a quantity of the actuating fluid is free to pass through the axial hole 1.8 to commingle with the water introduced through the swivel 7 and to pass with it to the bottom of the bore-hole.

It will be apparent that the water supply may be used without the actuating fluid, in

which event the axial hole 18 maybe dispensed with.

In the modification illustrated in Figs. 4:, 5 and 6, the water swivel 7 is shown constructed in two parts bolted together round the make-up piece, and the rear port-ion 6 which projects into the front end .of the machine is made cylindrical, and round said part 6 is provided a cylindrical piece or cap 21 which fits over the front end of the machine. This cap 2-1 is made of polygonal section internally and the front end of the machine is made of corresponding section externally in order to insure the rotation of the makeup piece with the machine. In other respects this construction is identical with the previously described construction and similar numerals of reference are employed to designate the same or corresponding parts.

In the further modification illustrated in Figs. 7 and-8, the rear part 6 which projects into the front end of the machine is a separate piece reciprocable in a hole 21 communicating at the inner end with the hole 15. The part 6 at its inner end is constructed with an enlargement 22 made of the same cross section as the hole 15 in which it slidingly 'fits. The enlar ement 22 abuts 'the inner end of the shan: 17 of the drill or bit 16. The shoulder 23 formed by the'enlargem'ent 22 engaging the bottom of the hole 15 round the forward end of the hole 21,operates as a stop for the piece 6, in a rearward direction.

21' (see Fig. 8) is an annular groove formedin the make-up piece round'the hole 21, placing the hole 19, which communicates with the recess 9 in the water swivel in communication with a transverse hole 21 in the part 6 leading to thehole 18.

What we claim as our invention and desire to protect by Letters Patent is 1. In a rock-drilling machine, the combi-,

nation, with a drill, of a detachable make-up piece positioned at the'front end of the dri l and sup orted and rotated thereby and constructe at the forward end with a hole of ammo non-circular transverse section, a bit constructed with a portion of corresponding non-circular transverse section loosely positioned in the hole in the make-up piece and supported and rotated thereby and con- 7 structed with a longitudinal hole com1nunieating with the hole in the make-up piece and leading to the cutting end, a. swivel mounted on the make-up piece and means for conducting Water to the swivel, the maltcup piece being constructed with passages for conveying water from the swivel and actu ating fluid from the drill to the longitudinal hole in the bit.

2. In a rock-drilling machine, in. combiso nation, a drill, a detachable make-up piccc loosely positioned at the front end. thereof and supported and rotated thereby, a hit carried at the front of the 1n like-n p piece and having a longitudinal hcle therein, a swivel g mounted on and closely surrounding the make-up piece and having a water-conducting opening periodically placed in communication with the longitudmal hole in the hit upon rotation of the latter, for alternately supplying water to the bit aforesaid and for cutting off said su )ply.

3. In a rock-drilhng machine, a drill a. dctachable make-up piece loosely positioned at the front end thereof and supported and rotated thereby, a bit carried at the front end of the make-up piece, said bit having a longi tudinal passage and the makeup piece having a port or passage in communication therewith, a swivel mounted on and closely surrounding the make-up Ipiece and having a short recess for periodica communicating with the port or passage in the make-up piece as the bit is rotated, to alternately supply water to the port or passage of the make-up piece and to cut off said supply, and means for conducting water to the swivel.-

4. In a rock-drilling machine, in combination, a drill, a detachable make-up piece loosely positioned at the front end thereof and supported and rotated thereby, a bit carried at the front end of the m ike-up piece, said bit having a longitudinal passage and the make-up piece, having two ports or passages, one extending from the end of this make-u piece and communicating with the longitudinal passage of the bit and the other port or passage communicating with the drill cylinder, a swivel mounted. round the make-up piece and having a recess adapted to communicate with the first-named port or passage in the make-up piece as the bit is rotated, to permit an intermittent supply of water to pass to the bit, and means for conducting water. to the swivel.

5. In combination, a bit having a passage disposed longitudinally therein a detachable make-up piece secured to the aforesaid bit for rotating the latter, said malte-u piece having a port in communication wlth the passe e of said bit, and a swivel mounted on and e qsely surrounding the make-up piece and having a short recess wherewlth the Eort of the make-up piece'is intermittently 5 rought into andout 'of register as the bit is rotated, and means for supplying water to the opening in the swivel.

In witness whereof we have hereunto set our hands in the presence of two subsvribing witnesses. v

v HENRY HELLMAN.

LEWIS CONDICT BAYLES.

' Witnesses:

CHAS. OVENDALE, FRED OVENDALE. 

